Milling-saw.



H. S. HUNTER.

MILLING SAW.

APPLICATION man 1uLY7.'1914.

l', 1 44;, 1 3.1 Ptented June 22, 1915.

THE A )RRIS PETERS CD., PHOTOALITHG.. WASHINGTON. D. C.

HARRY S; HUNTER, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 HUNTER. SAW &

VMACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

MILLING-SAW.

Specification of Letters Patent.

Patented J une 22, 1915.

Application filed July 7, 1914. Serial No. 849,589.

T0 all whom it may concern:

Be it known that I, HARRY S. HUNTER, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Milling-Saws, of which the following is a specification.

The object of this invention is to provide simple and efficient means for determining the position or adjustmentV of removable saw teeth, the invention being designed primarily for metal cutting saws, although applicable to removable-tooth saws generally without regard to their use.

Heretofore the tooth-adjusting means has been variously arranged at the inner ends of the sockets and require -machine work in the preparation of slots and cavities for their reception. The present invention obviates these expensive blade-weakening constructions by taking care of the adjustment wholly within the sockets, all special machine work for the sockets or teeth, or both, being avoided.

In the accompanying drawings, Figure 1 is a segment of the periphery of a metal saw embodying the invention. Fig. 2 is a crosssection taken on line 2-2 of Fig. 1. Figs. 3, 4 and 5 are detail views of the removable head or block at the inner end of each of the tooth sockets, and Figs. 6 and 7 are similar views of the filler strips for'determining the desired projection of the teeth. Figs. 8 and 9 are, respectively, side elevation and end view of two bars or blanks of half-round section from which the removable abutmentforming blocks may be economically produced.

Referring to the drawings, 2 designates the blade of a milling or other saw which is formed with the usual tooth-confining sockets 3. In the present adaptation the inner extremity of each socket is rounded or semi-circular, as indicated at 4, and projecting centrally from the edges or walls of the sockets, including its curved inner portion, is the bead 5.

6 are the removable teeth or cutters, and 7 the wedges for securing them in the sockets. The edges of cutters 6 and wedges 7 are curved as shown to embrace bead 5, and the meeting edges of the cutters and wedges are similarly interlocked at 8 to preclude lateral displacement. Some of the teeth may be formed for roughing as at 9, and others for i'inishing as at 10 in accordance with the usual practice. It will be understood, however, that the cutters may be variously secured without departing from the present invention.

The inner end of each of sockets 3 is provided with an abutment for the cutter which the latter may directly engage as when a cutter is new, or which may support interposed spacing strips when the cutter' becomes worn. In the present adaptation the abutment is in the form of a removable block 11 which is curved to lit the inner end of the socket and grooved at 12 to embrace bead 5. The outer extremity 13 of each block is fiat and parallel with the inner end extremity of the cutter to provide a bearing surface for the latter when no spacing elements are interposed, as shown at the lefthand side of Fig. 1. To maintain the cutters properly projected after their length has been decreased by wear and ling or grinding incident to sharpening, plate-like filler strips 14 are interposed between the cutter and block 11, the extremities of the strips being grooved at 15 to embrace bead 5, and as the strips correspond in width to the thickness of the teeth and blocks 11 they simply constitute continuations or extensions of the latter. Strips varying in thickness may be provided, and a strip of the required thickness or two or more strips of different thicknesses may be inserted as may be necessary to hold the cutter properly projected.

The inner extremity i of each socket is preferably curved in the arc of a circle, being substantially semicircular, as this formation may be conveniently and economically produced by a milling tool, and for the further reason that a concentrically curved socket end is adapted to receive a curved or semi-circular abutment-forming block the shape of which is conducive to economic manufacture. With the abutment blocks semi-circular, they may be produced from two bars of half-round section, illustrated in Figs. 8 and 9, the bars being placed in a lathe, and the grooves 12 for a series of blocks cut therein, after which the bars are cut transversely to form blocks of the desired thickness. The abutment blocks can thus be produced rapidly ivith much accuracy and With the exercise of less machine Work than Would be possible With blocks Vof other shape. It Will be understood, however, that the invention is not restricted t0 either the concentrically curved socket ends 4, or to abutmentforming blocks produced as herein described. Y

The invention obviates adjusting screws and similar devices and no special machine Work is necessary either in connection With the sockets or the blade and the strength of the latter is in no Way impaired.

I claim: y l

l. A one-piece saw blade having a socket` forming depression extending inwardly from its Working edge Vand with thev innerextrcmity of the socket semi-circular, a cutter removably itting the socket and having a straight inner extremity, cutter securing means, and a semi-circular block itting the semi-circular inner extremity of the socket, the block having a straight face disposed toward the outer end of the socket and parallel With and adapted to form an abutment for the straight inner extremity of the cutter.

2. |The combination of a saw blade formed with a socket and provided With a cutter abutment at its inner end, a cutter secured in the socket, and spacing strips adapted t0 be interposed between the cutter and the abutment with opposite ends of the strips interlocking ywith the socketmV i 3. The combination of a savv blade formed With a beaded socket and provided vvith a cutter abutment, a cutter secured in the socket, and spacing strips interposed be-i tween the abutment and the 4vcutterwand iothed at their ends to embrace Vthe socket `ea Y 4. The combination of a saw blade wformed With a `beaded socket, a removable .abutment-forming block fitting the inner end oi the socket and grooved to embracethe bead thereof, a cutter Within the socket, andV groove'd spacing strips` adapted to be interposed between the block and the cutter and embrace the socket bead. i Y

5. The combinationof a saw blade formed with a beaded'socket rounded at its inner en'd, a rounded abutment-forming block fitting said end and grocved tovenibracev the Copies of this patent may be obtained for ve cents each, by addressing Vthe C'ommisionr of :Patents` Washington, D. C. 

